Art of manufacturing asphalt from petroleum residue.



No. 634,818. Patented Oct. [0, I899.

J. w. HAYWARD. ART OF MANUFACTURING ASPHALT FROM PETRDLEUI RES IDUE.

(Application and Aug. 1a, 1898.]

(No llodel.)

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UNITED STATES PATENT OFFICE.

JOHN WILLIs HAYWARD, or CLEVELAND, OHIO.

ART oF MANUFACIQU RING ASPHALT FROM PETROLEUM RESIDUE.

SPECIFICATION formingpart of Letters LPatent No; 634,818, dated October 10,1899.

Application filed August 18, 1898 Serial H0. 688,865. (No Specimens.) l

This invention relates to improvements inthe manufacture of artificial asphalt from petroleum residue and in apparatus employed therein.

I According to this invention ground limestone or like mineral or equivalent substance in the, necessary proportion-say twenty to sixty per cent, accordingto the condition or quality of the residue or the product to be' made-is added to the petroleum residue, preferably before the oxidizing process, whereby the said mineral substance is more intimately mixed with the said residue and an increased surface'of the residue is presented to the action of the air and the oxidation of the material is more rapidly effected. The retort containing the mixture ofpetroleum residue and limestone is heated to the required tem perature and while the mixture is in a heated condition air, preferably under pressure, is admitted to the retort and efiicie-ntly diffused through the material, so as to rapidly oxidize the material and bring it to the required degree of consistency. In carrying out this process the retort in which the mixture of the petroleum residue and ground limestone or the like is heated and oxidized is caused to rotate on a stationary hollow shaft, through which the air is forced or caused to pass, the said hollow shaft being provided with hollow branches or arms through whichthe air passes from the said shaft into the material, the said arms also serving as agitators and scrapers to disintegrate or break up the mass of material and so facilitate the didusion of the air therethrough. To further facilitate the oxidation of the material, ozonized air may be forced thereinto while in a heated condition. Then ozonized air is employed to elfectthe oxidation of the petroleum residue, it may be in- The accompanying drawing illustrates in longitudinal vertical section a convenient arrangement of apparatus for carrying out this invention, but the invention is not restricted thereto and any suitable apparatus may be adopted without departing from the spirit of the invention.

A is a retort in which the mixture of petroleum residue and ground limestone or thelike is efiected, the said retort being provided with a manhole B, through which'the materials are fed into the same, and at one end with an outlet B, through which the product is discharged. The retort may be heated by any convenient mean'sas, for instance, by an arrangement of gas-jets or the like capable of being brought into position beneath the retort temporarily or permanently or by a f urnace or other available means, according to local conditions or circumstances. The retort is shown here as mounted on a non-rotating horizontal hollow shaft or tube C, carried in standards D and D and provided with stuffing-boxesat 0. Fixed to one of the ends 0 of the retort is a spur-wheel E, with which gears a pinion F, fast on a shaft G, mounted in a bearing H in the standard D and carrying a driving-pulley I, around which passes a driving-band from any suitable motor andtrans- ,mits through the gearing F and E motion of rotation to the retort A on the stationary 1101- low shaft 0.

Projecting downward from the hollow shaft O are branch pipes or arms K, extending to within a short distance from the interior surface of the retort and having their ends 70 fiattened or'spread out, so as to form afan-shaped escape into the hollow shaft 0 behind the stop a and pass away ihro ugh the outlet end of the said shaft.

The retort having been charged with the petroleum residue and ground limestone or equivalent mineral, the heatis applied to heat the retort, and the said retort being slowly rotated by means of the gearing hereinbefore described air,which may be ozonized, is forced by any suitable air-forcing device into the hollow shaft at'the end 00, which air is prevented by the plug a from passing directly through the said hollow shaft and caused to pass through the branches K into the material contained in the retort, the said air being efficiently diffused through the mass of material by reason of the fan-like shape of the ends of the branch pipes, which serve to agitate and disintegrate the material as the retort rotates, whereby the material is efliciently and rapidly oxidized. The air which percolates through the heated material rises to the upper part of the retort and passes down the branch pipe or passage L and away through the hollow shaft 0, as indicated by the arrows. The entrance to the air-outlet pipe or passage L is covered by a hood or cap Z, which will allow the air to escape, but prevent the material from entering the said pipe.

What I claim is In the manufacture of artificial asphalt from petroleum residue, the method of manufacture consisting in mixing pulverized limestone with the petroleum residue while it is in a heated state, and in this state oxidizing the mixture by subjecting it to the diffusion of air, substantially as described.

Witness my hand to the foregoing specification this 12th day of August, 1898;

JOHN XVILLIS HAYWARD.

Vitn esses:

H. T. FISHER, R. B. Mosnn. 

